chore(web): bump @nous-research/ui to 0.18.2

Picks up the deferred GPU-tier detection fix (design-language) that
stops the synchronous WebGL probe from blocking first paint, which was
causing a boot-time flash in the dashboard backdrop.

nix/web.nix npmDepsHash is a placeholder here and is corrected in the
follow-up commit using the hash reported by the Nix CI job.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/package.json

@@ -10,7 +10,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
-    "@nous-research/ui": "0.18.0",
+    "@nous-research/ui": "0.18.2",
     "@observablehq/plot": "^0.6.17",
     "@react-three/fiber": "^9.6.0",
     "@tailwindcss/vite": "^4.2.1",